binary GPS data for VI-example RF Record and Playback with NI USRP

[YYYs]

Hello,

In the demo video, a ublox was used to record the GPS signal while driving. How is it possible to record with u-center in a binary data format which is useable inside LabView for playing back the GPS signal? Ublox uses the *.ubx data format, is there a converter?

 

[Marco_Brauner]

Hi, I´m sorry, but at the very first I have to state that I cannot see any video at the link you´ve provided.

Anyway, it is the right document to get started with RF-Recording/Playback with the NI-USRP.

The USRP has a LabVIEW driver, so you don´t have to worry about file formats, you get the data as IQ-Clusters or arrays or whatever LabVIEW-datatype and

you can save it in your own binary format or with LabVIEW-provided functions, TDMS for instance.

If you want to import a certain binary file format into LabVIEW, you gotta have all the details about the header and dataformat of the file format.

Then, you can do a binary read, and interpret the data with the knowledge mentioned above.

If you don´t have this information, no chance.

There´s also a site where we host so called dataplugins for a number of common file-formats. https://www.ni.com/en/support/downloads/dataplugins.html

But I couldn´t find *.ubx there. So I guess you will have to implement it yourself.

Marco Brauner NIG

[YYYs]

Hi,

I guess you using some scriptblock plugin in your browser. You have to allow scripts from tesla.ni.com, then there is a video under the mentioned link. I already wrote ErikL a private message, but he has not answered yet.

[Anthony_F · Accepted solution]

Hello YYYs,

The file was not generated by uBlox, but by the record and playback VI.  An active GPS antenna, powered by some mini-circuits amplifiers, was connected to the USRP and the LabVIEW program created the file (USRP being used as a receiver)

Later the USRP is replaying the file (generating) and the Ublox GPS receiver is being fooled into thinking it's location is currently somewhere else.